import { Label } from '@/shared/shadcn/ui/label';
import { cn } from '@/shared/shadcn/utils';
import { type Label as LabelPrimitive, Slot as SlotPrimitive } from 'radix-ui';
import * as React from 'react';
import type { ControllerProps, FieldPath, FieldValues } from 'react-hook-form';
import { Controller, FormProvider, useFormContext } from 'react-hook-form';

const Form = FormProvider;

type FormFieldContextValue<
  TFieldValues extends FieldValues = FieldValues,
  TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>,
> = {
  name: TName;
};

const FormFieldContext = React.createContext<FormFieldContextValue>({} as FormFieldContextValue);

const FormField = <
  TFieldValues extends FieldValues = FieldValues,
  TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>,
>({
  ...props
}: ControllerProps<TFieldValues, TName>) => {
  return (
    <FormFieldContext.Provider value={{ name: props.name }}>
      <Controller {...props} />
    </FormFieldContext.Provider>
  );
};

const useFormField = () => {
  const fieldContext = React.useContext(FormFieldContext);
  const itemContext = React.useContext(FormItemContext);
  const { getFieldState, formState } = useFormContext();

  const fieldState = getFieldState(fieldContext.name, formState);

  if (!fieldContext) {
    throw new Error('useFormField should be used within <FormField>');
  }

  const { id } = itemContext;

  return {
    id,
    name: fieldContext.name,
    formItemId: `${id}-form-item`,
    formDescriptionId: `${id}-form-item-description`,
    formMessageId: `${id}-form-item-message`,
    ...fieldState,
  };
};

type FormItemContextValue = {
  id: string;
};

const FormItemContext = React.createContext<FormItemContextValue>({} as FormItemContextValue);

const FormItem = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
  ({ className, ...props }, ref) => {
    const id = React.useId();

    return (
      <FormItemContext.Provider value={{ id }}>
        <div ref={ref} className={cn('space-y-1', className)} {...props} />
      </FormItemContext.Provider>
    );
  }
);
FormItem.displayName = 'FormItem';

const FormLabel = React.forwardRef<
  React.ElementRef<typeof LabelPrimitive.Root>,
  React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root>
>(({ className, ...props }, ref) => {
  const { error, formItemId } = useFormField();

  return <Label ref={ref} className={cn(error && 'text-destructive', className)} htmlFor={formItemId} {...props} />;
});
FormLabel.displayName = 'FormLabel';

const FormControl = React.forwardRef<
  React.ElementRef<typeof SlotPrimitive.Slot>,
  React.ComponentPropsWithoutRef<typeof SlotPrimitive.Slot>
>(({ ...props }, ref) => {
  const { error, formItemId, formDescriptionId, formMessageId } = useFormField();

  return (
    <SlotPrimitive.Slot
      ref={ref}
      id={formItemId}
      aria-describedby={!error ? `${formDescriptionId}` : `${formDescriptionId} ${formMessageId}`}
      aria-invalid={!!error}
      {...props}
    />
  );
});
FormControl.displayName = 'FormControl';

const FormDescription = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLParagraphElement>>(
  ({ className, ...props }, ref) => {
    const { formDescriptionId } = useFormField();

    return (
      <p ref={ref} id={formDescriptionId} className={cn('text-[0.8rem] text-muted-foreground', className)} {...props} />
    );
  }
);
FormDescription.displayName = 'FormDescription';

const FormMessage = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLParagraphElement>>(
  ({ className, children, ...props }, ref) => {
    const { error, formMessageId } = useFormField();
    const body = error ? String(error?.message) : children;
    const classDestructive = error ? 'text-destructive' : '';

    if (!body) {
      return null;
    }

    return (
      <p
        ref={ref}
        id={formMessageId}
        className={cn('text-[0.8rem] font-medium', classDestructive, className)}
        {...props}
      >
        {body}
      </p>
    );
  }
);
FormMessage.displayName = 'FormMessage';

export { Form, FormControl, FormDescription, FormField, FormItem, FormLabel, FormMessage, useFormField };
